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NW, 5, 11.9116.
D. B. MILLER
2,41%78‘7
TELEPHONE SUBSTATION APPARATUS
Filed Feb. 23, 1945
2 Sheets—Sheet 1
ENVEN TOR.
0. B. MILLER
HTTOR/VEV
2,410,787
Fatented Nov. 5, 1943
UNITED STATES
T
2,410,7 87
TELEPHONE SUBSTATION APPARATUS
Donald B. Miller, Rochester, N. Y., assignor to
Stromberg-Carlson Company, Rochester, N. Y.,
a corporation of New York
Application February 23, 1945,_Serial No‘. 579,358
6 Claims. (01. 179-81)
1
2
This invention relates to telephone substation
apparatus and more particularly to switching
when the hook-switch contact springs are open
due to the presence of the hand set on the cradle
support; Fig. 3 is a similar view of the contact
springs of the hook-switch in their second or in
means for selectively operating the receiver con
tacts and. the transmitter contacts of a sub
station telephone.
Where telephone substation apparatus is used
termediate position which prevails after. the hand
set has been removed from the support but be
on a party telephone line of an automatic tele
fore the mechanism is further actuated manu
phone system, it sometimes happens that a sub
ally to advance the contact springs of the'hook
switch to their fully closed position, as illus
scriber at a second substation on that line closes
the hook-switch of his substation apparatus 10 trated in Fig. 4;
.
Fig. 5 is a fragmentary view showing the in
while a subscriber at a ?rst substation on this
party line is already engaged in transmitting dial
vention applied to a cradle type desk stand and
impulses corresponding to a wanted telephone
also illustrating how the mechanism can be fur
ther modi?ed to short-circuit the transmitter at
line. The actuation of the hook-switch at the
second substation on the party telephone line
noisy locations during such intervals as the sub
scriber thereat is not talking; and
will, under these conditions, mutilate the series
Fig. 6 is a diagrammatic showing of the sub
of impulses then being transmitted from the ?rst
substation, In accordance with one feature of
station circuits utilized with this mechanism and
the present invention, there is provided an ar
particularly indicating how the hook-switch
rangement whereby the removal of the telephone 20 contacts control these substation circuits.
hand set from the telephone support serves to
In Fig. 1 the invention is illustrated in con
move the hook-switch to a position wherein only
nection with a wall type telephone including a
' the telephone receiver of the substation is effec
housing 5 which is adapted to be attached to the
tively connected to the party telephone line, the
side wall of a room, a desk or other vertical sup
transmitter circuit thereof being held open at 25 port. This housing, which carries a dial D, is
this time. This affords the subscriber an oppo
provided with a cradle type support including
tunity to listen for aseries of dial impulses being
spaced pairs of integral upright portions 6, 6 be-_
sent over his party line from another substation
tween which the handle 1 of a combined trans
thereon and this can be done without mutilating
mitter and receiver or French type hand set is
the series of impulses. In the event that no such 30 adapted to rest when not in use. Between each
impulses are being sent at this time, this sub
pair 6, 6 of uprights of the support there is
scriber can manually operate the hook-switch
mounted a plunger 8 for movement through a
further which will be effective to connect the
guide passage 9 in the housing and through an
telephone transmitter in circuit with the tele
opening in the L-shaped bracket It. This
35
phone line so that this subscriber can proceed to
bracket is secured at each end thereof to the
complete his call.
inner wall of the housing as indicated at H.
Telephone substations are sometimes located in
Each of the plungers 8 has a shoulder 12 near
noisy locations, as a result of which it is fre
its lower end. These shoulders engage the brack
quently desirable to short-circuit the transmit
et i0 (Fig. 2) as a stop when the plungers have
ter at this station, during such intervals'as the
been forced to their lowermost position by the
subscriber located thereat, is not talking._ In
handle 1 of the handset while on its cradle sup
accordance with another feature of the present
port. The bracket is provided near the bend
invention, a novel arrangement is provided for
therein, with downwardly spaced ears is to re
manually short-circuiting the transmitter at the
ceive a pin 113 on which an angular hook-switch
substation during such periods as the subscriber 45 spring
actuator i5 is mounted. This actuator
thereat is not talking.
has an armature portion It normally contact
The invention will best be understood by refer
ing the lower ends of the plungers B. The actu
ence to the description, when taken with the
ator l5 also has a lower portion l1 adapted to
‘drawings, in which:
Fig. 1 is a front View of a wall type telephone 50 operate the motor spring I8 of a pair of receiver
contact springs comprising the motoryspring l8
substation having the present invention incor
and the stationary spring I!) and also to actu
porated therein;
_
ate the motor spring 20 of a pair of transmitter
. Figs. 2, 3 and 4 are fragmentary sectional views
springs comprising motor spring 20 and station
taken substantially on the line 2-2 of Fig. 1;
Fig. 2 showing the position of the mechanism 55 ary spring 2!. The several springs are support
2,410,787
3
ed on a downwardly extending arm 22 integral
with the bracket l0.
It should be pointed out that in accordance
with the present invention the transmitter
springs 20 and 2| remain open but the receiver
springs 18 and 19 are closed when the handle ‘I
of the hand set is removed from its cradle. The
plungers 8 will tend to move upward due to the
tension of the mentioned receiver and transmit
ter motor springs applied through the actuator
I5 to the lower ends of these plungers 3. How
ever, the armature portion N5 of the actuator is
4
mally open except when its button 46 is depressed.
In this arrangement, the button 46 is in the path
of the latch 24 so that while the subscriber presses
down on the horizontal portion 26 of the L-shaped
member, the latch 24 actuates the button 46.
Button 46 closes the microswitch 45 so that its
contacts short-circuit the transmitter. It should
be mentioned that when the microswitch is used
it will be connected in the substation circuits of
Fig. 6 at the points indicated at X and Y.
What I claim is:
1. In combination, a telephone housing, a trans
provided with a catch 23 which will now engagl
mitter and a telephone receiver associated with
a latch 24 to limit further clockwise movement
said housing, at least said receiver being movable
of the actuator. The latch 24 is carried at the 15 with respect to said housing, a set of receiver
lower end of the vertical portion 25 of an in
spring contacts and a set of transmitter spring
verted L-shaped member having a horizonta.
contacts mounted within said housing, an actu
portion 26. The L-shaped member, including the
ator movable to a primary position in which it
horizontal portion 26, is adapted to extend across
opens both of said sets of contacts and to an inter
the space between the pair of uprights 5 on the 20 mediate position in which it maintains said trans
cradle support. The vertical portion 25 of this
mitter contacts open while permitting said re
member is pivoted on a horizontal pintle 28 sup
ceiver contacts to close and to a secondary posi
ported in suitable upright ears 29 located on each
tion in which it permits both sets of contacts
side of the ‘bracket 10. A coil spring 30 encircling
to close, an element extending from the outside
the pintle 28, has one end embracing the hous 25 of said housing into the interior thereof, said
ing and has its other-end engaging the lower edge
element being e?ective under the weight of said
of the vertical portion 25 of the L-shaped mem
receiver to advance said actuator to its primary
ber. The spring tends to rotate a part of this
position, a latch within said housing and effec
member, against a suitable stop 33. With catch
tive on the lifting of said receiver to retain
23 on the actuator held by the latch 24, the ac 30 said actuator in its intermediate position, and a
tuator moves only to the position wherein the
member actuated from the outside of said housing
receiver contact springs 18 and 39 are closed
for releasing said latch from said actuator.
(Fig. 3). At this time the transmitter springs
2. In combination, a telephone housing, a
20 and 2| are open so that the transmitting por
transmitter and a telephone receiver associated
tion of the substation circuit (Fig. 6) is ineffec 35 with said housing, at least said receiver being
tive and consequently the dial impulses on a si
movable with respect to said housing, a set of
multaneous call from another substation of the
receiver spring contacts and a set of transmitter
same party line, will not be mutilated.
spring contacts mounted within said housing, an
When the subscriber at this substation has
actuator movable to a primary position in which
ascertained that no other substation on his party 40
it opens both of said sets of contacts and to
line is engaged in completing a call, he will press
an intermediate position in which it maintains
down on thehorizontal portion 26 of the L-shaped
said transmitter contacts open while permitting
member as far as stop 32. This will rock the
latch 24 out of the path of the catch 23 on the
actuator. Thus the ‘actuator l5 can rock clock
wise so that not only the receiver contact springs
[Band I9 but also the transmitter contact springs
20 and 2| will be closed, as illustrated in Fig. 4.
It will be understood, of course, that the handle
‘I, when the hand set is replaced on its cradle,
will push down the plungers 8 to rock the actuator
in a counterclockwise direction until the actuator
strikes the stop 34. This in turn opens both the
receiver contact springs and the transmitter con
tact springs as shown in Fig. 2. The mechanism
of the present invention can also be mounted in
the housing 35 of a cradle type desk stand, as
illustrated in Fig. 5. When used in a desk stand
said receiver contacts to close and to a secondary
position in which it permits both sets of con
tacts to close, an element extending from the
outside of said housing into the interior thereof,
said element being effective under the Weight
of said receiver to advance said actuator to its
primary position, a latch within said housing and
effective on the lifting of said receiver to retain
said actuator in its intermediate position, a
member actuated from the outside of said hous
ing for releasing said latch from said actuator,
and a switch under the control of said member
for short-circuiting said transmitter at will.
3. In combination, a telephone housing, a
transmitter and a telephone receiver associated
with said housing, at least said receiver being
movable with respect to said housing, a set of
receiver spring contacts and a set of transmitter
Here also the coil spring 30 encircles the pintle
spring contacts mounted within saidhousing, an
28 and one end of the spring engages the lower
actuator movable to a primary position in which
edge of the vertical part 25 of the L—shaped mem
it opens both of said sets of contacts and to an
ber but the other end of the coil spring engages
intermediate position in which it maintains said
one side of a lug 39 integral with the housing. 65 transmitter contacts open while permitting said
This spring tends to rotate the L-shaped member
receiver contacts to close and a secondary posi
counterclockwise against the other side of the lug.
tion in which it permits both sets of contacts to
This mechanism operates in the manner already
close, a vertically movable plunger extending from
described. However, in the arrangement shown
the outside of said housing into the interior
in Fig. 5, provision has also been made whereby 70 thereof, said plunger being e?ective under the
the telephone transmitter of this substation can
weight of said receiver to advance said actuator
be short-circuited at will, when used in a noisy
to its primary position, a latch within said hous
location. To effect this result, there is mounted
ing and e?ective on the lifting of said receiver
within the housing a so-called microswitch 45,
to retain said actuator in its intermediate posi
which maintains its contacts (not shown) nor 75 tion, and an element actuated from the outside
housing, the L-shaped bracket I0 is fastened by
one or more screws 36 to. a rib 3'! of the housing.
_ 2,410,787
5
6
of said housing for releasing said latch from said
actuator.
mitting said receiver springs to close and a sec
_ 4. In combination, atelephone housing, ahand
set including a transmitter and a receiver joined
by a handle, a cradle support on said housing
ondary position in which it permits both sets of
springs to close, an element extending from the
outside of said housing into the interior thereof,
said element being effective under the weight of
comprising two pairs of spaced uprights, the up
said handle to advance said actuator to its pri
rights of a pair being separated a distance apart
suf?cient to receive the handle of the handset
therebetween, a generaliy horizontal pivotally
mounted member between said uprights and 10
mary position, said latch being effective on the
lifting of said handle to retain said actuator in
its intermediate position, said member being mov
able at will for disengaging said latch from said
adapted to be rocked a limited amount, a latch
actuator, and a switch under the control of said
within said housing controlled by said member,
member for short-circuiting said transmitter.
6. In combination, a telephone housing, a
a set of receiver contact springs and a set of
handset including a transmitter and a receiver
transmitter contact springs mounted within said
housing, an actuator movable to a primary posi 15 joined by a handle, a cradle support on said hous
tion in which it opens both of said sets of springs
and to an intermediate position in which it main
tains said transmitter springs open while per
mitting said receiver springs to close and a sec
ing comprising two pairs of spaced uprights, the
uprights of a pair being separated a distance
apart sumcient to receive the handle of the hand
set therebetween, an inverted L-shaped member
ondary position in which it permits both sets 20 pivoted for rocking movement about a horizontal
axis, said member having a generally horizontal
of springs to close, and an element extending
portion extending between said pairs of uprights,
from the outside of said housing into the interior
said member having a substantially vertical por
thereof, said element beingeffective under the
tion provided at its lower end with a latch ex
weight of said handle to advance said actuator
to its primary position, said latch being effective 25 tending into said housing, a set of receiver con
tact springs and a set of transmitter contact
on the lifting of said handle to retain said actu
ator in its intermediate position, said member
being movable at will for disengaging said latch
from said actuator.
5. In combination, a telephone housing, a hand 30
set including a transmitter and a receiver joined
by a handle, a cradle support on said housing
comprising two pairs of spaced uprights, the up
rights of a pair being separated a distance apart
su?icient to receive the handle of the handset
therebetween, a generally horizontal pivotally
mounted member between said uprights and
adapted to be rocked a limited amount, a latch
within said housing controlled by said member,
a set of receiver contact springs and a set of
transmitter contact springs mounted within said
housing, an actuator movable to a primary posi
tion in which it opens both of said sets of springs
and to an intermediate position in which it main
tains said transmitter springs open while per 45
springs mounted within said housing, an actua
tor movable to a primary position in which it
opens both of said sets of springs and to an
intermediate position in which it maintains said
transmitter springs open while permitting said
receiver springs to close and to a second position
in which it permits both sets of springs to close,
and a pair of plungers each extending from be
tween a pair of uprights at the outside of the
housing to the interior of said housing, said
plnngers being effective under the weight of said
handle to advance said actuator to its primary
position, said latch being effective on the lifting
of said handle to retain said actuator in its
intermediate position, said member being mov
able at will for disengaging said latch from said
actuator.
DONALD B. MILLER.
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